Ultrastrong and ductile additively-manufactured medium-carbon steel via modulating austenite stability

Wang, Jinhua; Wang, Shidong; Li, Weiting; Yao, Yingjie; Wang, Xiaopei; Yang, Zhigang; Chen, Hao

doi:10.1016/j.scriptamat.2023.115780

Cited by 8 publications

(2 citation statements)

References 23 publications

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“…The optimization process developed by the research team was employed, where the substrate was preheated to 200 °C. [8] The scanning strategy utilized a stripe scanning pattern with a rotation angle of 67°b etween layers. As for the EBM samples, they were fabricated using a Y-150 system (China) obtained from Xi'an Sailong Additive Technology Co., Ltd.…”

Section: Methodsmentioning

confidence: 99%

Assessment of Mechanical Behavior in H13 Tool Steel Synthesized through Electron Beam Melting and Selective Laser Melting Techniques

Han,

Wang,

Zhang

et al. 2024

steel research int.

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This study investigates H13 tool steel's microstructure and mechanical properties using selective laser melting (SLM) and electron beam melting (EBM). SLMed‐H13 steel has fine martensite, residual austenite, dense low‐angle grain boundaries (LAGBs), and nanoscale carbides, whereas EBMed‐H13 predominantly shows lamellar ferrite–bainite, needle‐like lower bainite (Blower), and spongy upper bainite (Bupper), with fewer LAGBs and larger carbides. SLMed‐H13 exhibits higher hardness (617.4 HV0.5) than EBM (532.17 HV0.5), with a yield strength (YS) of 1241.1 MPa, ultimate tensile strength (UTS) of 1412.2 MPa, and elongation (El) of 5.36%, versus EBM's 765.8 MPa YS, 1252.7 MPa UTS, and 6.89% El. SLM shows superior mechanical performance and wear resistance, with a coefficient of friction (COF) of 0.81, wear depth of 0.86 μm, wear track of 448.4 μm, and wear rate of 5.5 × 10−6 mm3 N−1 m−1, compared to EBM's 0.68 COF, 2.2 μm wear depth, 508 μm wear track, and wear rate of 6.5 × 10−6 mm3 N−1 m−1. Confocal microscopy highlights SLM's uniform wear tracks versus EBM's distinct microcutting, illustrating the impact of manufacturing techniques on material properties and wear performance.

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Section: Methodsmentioning

confidence: 99%

Assessment of Mechanical Behavior in H13 Tool Steel Synthesized through Electron Beam Melting and Selective Laser Melting Techniques

Han,

Wang,

Zhang

et al. 2024

steel research int.

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“…The high strain-hardening rate observed in AMH is also observed in some AMH with different process conditions. [20][21][22] However, it is not a universal phenomenon because there are also cases of high YS and low strainhardening rate in the as-printed state. [23][24][25] At all indentation depths, AMH consistently exhibited higher hardness than CMH (Figure 2c).…”

Section: Mechanical Properties Of Amh and Cmhmentioning

confidence: 99%

Influence of Cell Structure on Yield Strength and Strain‐Hardening Behavior in Additively Manufactured H13 Hot Work Tool Steel

Kim,

Cho,

Kim

2024

steel research int.

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Mechanical properties including yield strength, hardness, and strain hardening are superior in additively manufactured H13 hot work tool steel (AMH) compared to conventional H13 (CMH), which are correlated with microstructural characteristics. Comprehensive microstructural analysis reveals that the strain is highly localized in the cell structure with retained austenite in AMH. Quenching and tempering (QT) heat treatment removes the cell structure and retains austenite from AMH, resulting in a microstructure and mechanical properties similar to CMH after QT. The constitutive equation for yield strength shows that retained austenite with sufficient amount of dislocation density in martensite contributes to higher yield strength in AMH than CMH and identical strengthening mechanism between AMH and CMH after QT. Furthermore, microstructural changes during plastic deformation are investigated to find the origin of high strain‐hardening rate in AMH. The relationship between hardness and indentation depth yields the higher statistically stored dislocation density in AMH than CMH. In addition to higher dislocation accumulation, transformation of retained austenite to α′ martensite results in transformation‐induced plasticity effect, which contributes to strain hardening.

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Austenite Tailoring for Strength and Ductility Enhancement in Medium Mn Steel: A Brief Review

Wen,

Li,

Zhang

et al. 2024

JOM

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Ultrastrong and ductile additively-manufactured medium-carbon steel via modulating austenite stability

Cited by 8 publications

References 23 publications

Assessment of Mechanical Behavior in H13 Tool Steel Synthesized through Electron Beam Melting and Selective Laser Melting Techniques

Assessment of Mechanical Behavior in H13 Tool Steel Synthesized through Electron Beam Melting and Selective Laser Melting Techniques

Influence of Cell Structure on Yield Strength and Strain‐Hardening Behavior in Additively Manufactured H13 Hot Work Tool Steel

Austenite Tailoring for Strength and Ductility Enhancement in Medium Mn Steel: A Brief Review

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